Chapter 6 Review



Chapter 6 Practice Assessment ~ The Supplemental Practice Problems on pp. 814 – 817 are also GOOD!

1. List 4 examples of evidence for a chemical change/reaction.

2. For each of the following reactions:

a. Write a word equation

b. Write a balanced chemical equation

c. Classify the reaction by its type

• Pb(NO3)2 + Na2CO3 → PbCO3 + NaNO3

• Cu + AgNO3 ( Ag + Cu(NO3)2

• C6H14 + O2 ( CO2 + H2O

• N2O5 + H2O → HNO3

• NH4NO3 → N2 + H2 O + O2

3. Magnesium metal reacts with chlorine gas to form solid magnesium chloride.

• Write the word equation.

• Write the balanced chemical equation (include states of matter).

• What type of reaction is it?

4. Aqueous solutions of barium nitrate and sodium phosphate react in a double displacement reaction to produce a precipitate of barium phosphate and a second soluble product. Write the balanced chemical equation for this reaction. Include the states of matter.

5. Predict the products of the following reactions and write a balanced chemical equation:

a) Barium nitrate and sodium chloride have a double displacement reaction

b) methane and oxygen have a combustion reaction

c) lithium and oxygen have a synthesis reaction

d) sodium and lithium nitride have a single displacement reaction

e) Strontium oxide has a decomposition reaction

6. Describe 4 specific ways to increase reaction rate and 4 specific ways to decrease reaction rate.

7. Define limiting reactant, and be able to apply this concept to a balanced chemical equation. See pp. 816-817 #s 22, 30

8. Consider the following balanced chemical equation to answer the questions which follow:

Sn(s) + 2O2(g) → 2SnO2(s)

a) What is the coefficient for oxygen?

b) What is the state of matter of tin (IV) oxide?

c) What is the subscript for oxygen?

d) What type of reaction is shown?

e) If 10 units of tin react with 15 units of oxygen, which reactant is limiting and why?

9. Define equilibrium, and give specific examples of stressors that can be applied to a reaction to shift the direction to the left or to the right. See pp. 816-817 #s 14 through 17, 23 through 29

10. Will the following reaction that is at equilibrium shift to the left or to the right to readjust after each of the following stressors are applied:

2KNO3(s) + energy ↔ 2KNO2 + O2 (g)

a) Heat is added b) Potassium nitrate is removed c) oxygen is removed

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